Air-valve for coke-ovens or the like



W. E. ROBERTS. Am vALvE FOR COKE ovENs 0R THE LIKE..

APLICATION FILED FEB?. 1919.

Patented Oct. 25, 1921.

2 SHEETS-SHEET l.

W. E. RBERTS. AIR VALVE FOR COKE OVENS 0B THE LIKE. APPLICATION FILED FEB. 7. 1919.

1,395,060, Patented 00u 25, 1921.

r 2 SHEETS-SHEET 2.

. U- ZL I UNITED STATES PATENT OFFICE.

WILLIAM E. ROBERTS, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNLIENTS, 'IO FOUNDATION OVEN CORPORATION, OF NEWr YORK, N. Y., A CORPORATION OF NEXV YORK.

AIR-VALVE FOR COKE-OVENS OR THE LIKE.

Speccaton of Letters Patent.

Patented Oct. 25, 1921.

T0 all whom t may concern:

Be it known that I, WILLIAM E. ROBERTS, a citizen of the United States, residing in the city, county, and State of New York, have invented certain new and useful Improvements in Air-Valves for Coke-Ovens or the like, of which the following is a specification.

In by-product coke ovens and similar apparatus operating in conjunction with a regenerator air is admitted from the atmosphere to a port of the regenerator whence it passes through the regenerator to combustion chambers or ues in or around the ovens and thence the hot combustion products pass through a second regenerator and to outlet fines connected to a stack or exhaust fan; and after a period of time the valve connections are reversed so that air from the atmosphere is admitted to the second regenerator and passes through the combustion chambers and the combustion gases pass back through the first regener'ator and out through the port which was previously its inlet and thence to the exhaust flue. The valves for controlling the air connections have given considerable difliculty, being subjected alternately to the comparatively coldatmospheric air passing into the port of the regenerator and to the very hot products of combustion passing out from the regenerator to the exhaust flue, and being subject to a temperature and to variations of temperature which in the course of time distort it and cause leaks and difficulty in operation. To avoid these difiiculties a great many expedients` have been adopted and in many cases two valves have been used for each regenerator port, one for merely admitting or cutting off atmospheric air and the other for admitting or cutting communication with the exhaust flue; and the various valves of this and other 'sorts which have been used Vhave been complicated in design and expenuse, and which are very reliable in operation.

The accompanying drawings illustrate embodiments of the invention.

Figure l is alongitudinal section of a valve mounted in connection with ports of a regenerator and an exhaust fine;

Fig. 2 is a cross-section of the same;

Fig. 3 is an end view of the branch of the valve which communicates with the regenerator;

Fig. 4 is a horizontal section on the linc 4 4 of Fig. l;

Fig. 5 is a plan of an air damper for controlling the admission of atmospheric air;

Figs. 6 to 9 illustrate another construction; Fig. 6 being a longitudinal section, Fig. 7 an end view of the casing, Fig. 8 an opposite end view of the valve and operating mechanism and Fig. 9 a plan of the same.

Referring first to the embodiment of the invention illustrated in Figs. l to 5, the valve A has a lateral branch B communicating with the port C through a wall D of the regenerator. and has a downward branch E communicating with a port F of the exhaust flue G.

The branch B of the valve body is rectangular in cross-section to make an easier connection with a rectangular portI in the brick wall of the regenerator. Its upper side is formed with a slot H through which a plate or damper J may be passed to adjust the open cross-section as desired, this branch being provided also'with ribs L engaging the rear face of the plate J and holding it against the outward suction. The damper J 'can be raised or lowered to any desired position and fastened there by any usual or suitable means such, for example, as the pin shown passing through one of a series of holes therein. Such a damper is used on the several valves of an installation to compensate for the differences in suction on the different valves by reason of their relative 1ocations along the flue.

At the upper and lower ends of the valve chamber are cylindrical seats or bearings M and N turned or ground to make as good a vcation with the valve chamber.

it is lowered below this position these lat-` tit with the valve body as the temperature variations will permit.

The valve body comprises two cylindrical portions O and P continuous with each other and divided by a transverse diaphragm Q, across the interior. The valve body is formed also with an upper head R and a lower head S and these heads and the dia-A openings. When the valve body is elevated to the position shown or higher the lateral openings therethrough are out of communieral openings communicate with the valve chamber and air passes from the atmosphere through such openings intothe branch lB and the port C of the regenerator. The cylindrical surface of the valve body is extended below the lower head thereof by means of wings X which maintain'a proper bearing in the seat N when the valve. is` lifted vabove the position shown.

The lower head-S of the valve is imperforate and therefore in the position shown or in any lower position serves to cut off communication between the regenerator and the exhaust flue. But'when the valve is elevated above the position shown, so that the lower hea-d S passes above the seat N, a passage is opened below the lower head and between the wings X by which the products of combustion can pass from the regenerator and through the parts B and E of the valve casing to the exhaust tlue. Y A

Various devices for raising and lowering the valve Stem may be adopted. l have shown a bearing block Y mounted on a lateral extension. of the valve casing and carrying a lever having an arm Z which is connected through. a link 2 to the upper end of the stem U and having an arm 3 which is actuated by a rod et passing through a crotch in the upper end of the arm 3 and having suitable collars such as 5 thereon which strike the arm 3 and actuate the valve in one direction or the other as the rod is moved to the right or to the left. Such an operating rod is usually provided and extends to an interlocking system to insurel thel opening and closing at proper relative times of the different valves of an oven. 'v

:For regulating the quantity of air admitted through the upper head R an air plate 6 is mounted to turn on the center T of the valve and is provided with openings -7 ada-pted` to` register more or less with the openings in the head'R of the piston as the plate But when is turned. Holes 8 are provided through which a pin (Fig. 1) may be dropped in a hole drilled in the edge of the valve body, so as to hold the plate, against accidental displacement.

The` inlet port communicating with the atmosphere is at the side ofthe casing opposite to that of the outlet'through which 'the hot gases of combustion pass to the flue so as to minimize the effect or the difference in temperature of the air and the combustion gases respectively. The casing is simple in design and provides an abundant cross-sec; tion for the free flow of air and gases. All the parts are easily accessible for withdrawal for repair or replacement.

In Figs. 6 to 9 I have shown a modified Jform oi' 'my valve specially useful for particular cases. For greatercompactness the valve casing 9 is made of less height, with an obleng branch 10 which communicates with Ihe regenerator through a section of piping 11 oblong at one end to fit the valve caring and extending upward and. squared atits opposite end where it communicates with the port C of the regenerator D. The

casing is also provided with a downwardlyV depending guide flange 12 toA form the upper bea-ring for the valve body, its lower bear ing N being the same as in Fig. 1.A The valve body is likewise reduced in height comprising a cylindrical portion 13 with depending guide wings 14 which engage the lower bearing N when the valve is in thel raised, exhausting position.'ofv Fig. 6. The upper'part of the cylindrical portion of the valve body is provided with openings lwhich in the elevated positionrof the valve extend `above the casing 9. The top of the valve is openY and, wheniit is lowered to close the exhaust port, air passes through the top of the 1 valve body and through the` side openings 15 into the regenerator. Y Y

Withinthe upper part of the valve body is an air regulatingring 16 provided with openings 17, whichfby the turning of the ring, can 'be caused to register more or less with the openings 15 of the valvev to regulate the quantity of airadmitted. 1

This construction has an advantage over that of Figs. 1 and 5 in permitting the valve to be-designed for the maximum volume of air desired, without increasing its diameter. `By making the height of the openings 15 and 17 correct the volume of air can beincreased to the full capacity of the crosssection of the cylindrical valve through which the air enters; Vwhereas with a regulat-or of the type shown in Fig. 5 only a fraction of this cross-section can be used.

the pipe 11 leading to the regenerator.v The r Withk this comparatively fiat style of cas-l `-in g I may also arrange the operating mechanism soV as to require onlyV a small space, vnot extending substantially above the topfof l details @t this operating mechanism are shown in Figs. 8 and 9.' The stem U of the valve is connected at its upper' end through a link 18 to an arm 19 on a shaft 2O mounted on a bracket 21 on the top of the valve casing 9 and carrying a downwardly extending arm 22 which is engaged by the collars 5 on the operating rod 1.

Fig. 6 shows the exhausting position of this valve. It can be lowered until the cylindrical portion 13 of the valve just spans the distance between the depending bearing flange 12 and the lower bearing N, cutting oil both air and combustion gases. Or by lowering it still further air is admitted, through the top of the valve and through the ports in the regulator and in the upper part of the cylinder to pass to the regenerator.

Though l have described with great particularity of detail certain embodiments of my invention, yet it is not to be understood therefrom that the invention is restricted to the exact' designs shown. Various modifications thereof may be made by those skilled in the art without departing from the invention as defined in the following claims.

What I claim is- 1. An air valve for coke ovens or the like comprising a casing with branches communicating with a regenerator port and an exhaust lue respectively and having a valve chamber with cylindrical bearings or seats at opposite sides and a hollow cylindrical valve body sliding in said bearings. having an end open to the atmosphere and having lateral openings and adapted in one position to admit air from the atmosphere past one of said bearings to the regenerator and in another position to admit gases of com bustion from the regenerator past the other bearing to the exhaust flue. Y

2. An air valve for coke ovens or the like comprising a casing with branches commu-- nicating with a regenerator port andan exhaust flue respectively and having a valve chamber with cylindrical bearings or seats at opposite sides and a cylindrical valve body sliding in said bearings and adapted in one position to admit air from the atmosphere past one of said bearings to the regenerator and in another position to admit gases of combustion from the 'regenerator past the other bearing to the exhaust iiue and a regulator for controlling the volumel ot air admitted.

v 3. An air valve for coke ovens or the like comprising a casing with branches communicating with a regenerator port and an exhaust flue respectively and having a valve chamber with cylindrical bearings or seats at opposite sides and a cylindrical valve body sliding `in said bearings, said valve having` open ends and having one set of lateral passages opening te the atmosphere and to the valve casing in one position and another set of lateral passages opening to the exhaust flue and to the valve casing in another position. the two sets of passages being independent.

4. An air valve for coke ovens or the like comprising a casing with branches communicating with a regenerator port and an exhaust flue respectively, said casing having its opposite walls formed with cylindrical bearings or seats and a cylindrical valve body sliding in said bearings and adapted in one position to admit air from the atmosphere past one of said bearings to the regenerator and in another position to admit gases of combustion Jfrom the regenerator past the other bearing to the exhaust flue, the seat through which air is admitted being formed by a flange depending within the casing.

5. An air valve for coke ovens or the like comprising a casing with branches communicating with a regenerator port and an exhaust flue respectively and having a valve chamber with cylindrical bearings or seats at opposite sides and a cylindrical valve body sliding in said bearings and adapted in one position to admit air from the atmosphere past one of said bearings to the regenerator and in another position to admit gases of combustion from the regenerator past the other bearin to the exhaust flue, said valve body having a transverse wall and having an open end and openings through its side between said end and said transverse wall.

6. An air valve for coke ovens or the like comprising a casing with branches communicating with a regenerator port and an exhaust flue respectively and having a valve chamber with cylindrical bearings or seats at opposite sides and a cylindrical valve body sliding in said bearings and adapted in one position to admit air from the atmosphere past one of said bearings to the regenerator and in another position to admit gases of combustion from the regenerator past the other bearing to the exhaust Hue, said valve body having a diaphragm and having an open upper end and openings through its side above said diaphragm, and an air regulator consisting of a ring fitting the upper portion of said valve body and having openings adapted to be turned to register more or less with the openings in the valve body.

7. An air valve for coke ovens or the like comprising a casing having a valve chamber with cylindrical bearings or seats at opposite sides and an open-ended hollow cylindrical valve body sliding in said bearings, provided with lateral openings and adapted in one position to admit air to the regenerator and in another position to admit gases of combustion from the regenerator to the exhaust fluel 8. An air vvalve for coke ovens or the like tion from the regenerator to the exhaust comprising a casing having a valve chamber Hue, said body having a transverse Wall, an with cylindrical bearings or seats at oppoopen end and openings through its side com- 10 site sides and a cylindrical valve body slidmunieating With the end opening. ing in said bearings and adapted inone po- In Witness whereof, I have hereunto sition to admit air to the regenerator and in signed my name. another position to admit gases of combus- WILLIAM E. ROBERTS. 

